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Class jclass.chart.JCChartUtil

java.lang.Object
   |
   +----jclass.chart.JCChartUtil

public class JCChartUtil

extends Object

DEFAULT_FLOAT

Default floating point value

DEGREES

Angle unit enum value indicating angle unit is degrees

GRADS

Angle unit enum value indicating angle unit is gradians

M_2PI

Value of pi multiplied by 2

M_PI

Value of pi

M_PI_2

Value of pi divided by 2

M_SQRT2

Square root of 2

MAX_PRECISION

Maximum precision value

RADIANS

Angle unit enum value indicating angle unit is radians

JCChartUtil()

abs(double)

Returns the absolute value of a floating point number.

abs(int)

Returns the absolute value of an integer number.

boundAngle(int, double)

Guarantees that an angle value lies within its valid range.

brighter(Color)

Calculates the color even when it is saturated, for example, when it is black or white.

clamp(double, double, double)

Ensures that a value within a provided range

clamp(int, int, int)

Ensures that a value within a provided range

clamp(long, long, long)

Ensures that a value within a provided range

convertAngle(int, int, double)

Method to convert an angle value from one unit to another

darker(Color)

Calculates the color even when it is saturated, for example, when it is black or white.

degToRad(double)

Method to convert degrees to radians

format(double, int)

Formats a value for display.

log10(double)

Java only provides a natural logarithm function, so this method is necessary to perform log-base-10.

logFormat(int)

Formats a value for display on a logarithmic axis.

max(double, double)

Returns the maximum of two floating point values.

min(double, double)

Returns the minimum of two floating point values.

nicePrecision(double)

Returns a nice precision value for this range.

pow10(int)

10^x function that makes use of a predefined array (tens_val)

precCorrect(int, double)

Rounds a number to the specified precision.

radToDeg(double)

Method to convert radians to degrees

trace()

Debug method that displays a call stack at a particular point.

validUnit(int)

Checks a value to see if it is part of the angle unit enum; DEGREES, RADIANS or GRADS

  public final static double M_PI

Value of pi

  public final static double M_PI_2

Value of pi divided by 2

  public final static double M_2PI

Value of pi multiplied by 2

  public final static double M_SQRT2

Square root of 2

  public final static int DEGREES

Angle unit enum value indicating angle unit is degrees

  public final static int RADIANS

Angle unit enum value indicating angle unit is radians

  public final static int GRADS

Angle unit enum value indicating angle unit is gradians

  public final static int MAX_PRECISION

Maximum precision value

  public final static double DEFAULT_FLOAT

Default floating point value

  public JCChartUtil()

  public final static double degToRad(double d)

Method to convert degrees to radians

Parameters:

d - angle value in degrees

Returns:

converted value in radians

  public final static double radToDeg(double r)

Method to convert radians to degrees

Parameters:

d - angle value in radians

Returns:

converted value in degrees

  public static boolean validUnit(int unit)

Checks a value to see if it is part of the angle unit enum; DEGREES, RADIANS or GRADS

Parameters:

unit - enum representing an angle unit

Returns:

true if the unit enum is valid, false otherwise.

  public static double boundAngle(int unit,
                                  double angle)

Guarantees that an angle value lies within its valid range. For example, all degree values should be between -360 and 360.

Parameters:

unit - unit for the angle value

angle - value

bound - angle value

  public static double log10(double a)

Java only provides a natural logarithm function, so this method is necessary to perform log-base-10.

Parameters:

a - floating-point value

Returns:

log-base-10 of the provided value

  public static int nicePrecision(double range)

Returns a nice precision value for this range. It does not take into account font size, window size, etc. Instead, use the log10 of the range.

  public static double clamp(double x,
                             double lo,
                             double hi)

Ensures that a value within a provided range

Parameters:

x - value that requires clamping

lo - low value in the range

hi - high value in the range

Returns:

clamped value that lies between lo and hi.

  public static int clamp(int x,
                          int lo,
                          int hi)

Ensures that a value within a provided range

Parameters:

x - value that requires clamping

lo - low value in the range

hi - high value in the range

Returns:

clamped value that lies between lo and hi.

  public static long clamp(long x,
                           long lo,
                           long hi)

Ensures that a value within a provided range

Parameters:

x - value that requires clamping

lo - low value in the range

hi - high value in the range

Returns:

clamped value that lies between lo and hi.

  public static String logFormat(int exponent)

Formats a value for display on a logarithmic axis. Note that this routine currently calls JCChartUtil.format()

Parameters:

exponent - Exponent of log value

Returns:

formatted string

  public static String format(double v,
                              int ndigit)

Formats a value for display. Performs the equivalent of sprintf(buffer, "%.*f", ndigit, v);

Parameters:

v - value to format

ndigit - number of digits to appear in the formatted string

Returns:

formatted string

  public static double convertAngle(int oldUnit,
                                    int newUnit,
                                    double angle)

Method to convert an angle value from one unit to another

Parameters:

oldUnit - unit of the provided angle value

newUnit - unit of the new angle value

angle - angle value

Returns:

converted angle value

  public static double pow10(int x)

10^x function that makes use of a predefined array (tens_val)

Parameters:

x - x in 10 ^ x

Returns:

requested power of 10

  public static double precCorrect(int prec,
                                   double value)

Rounds a number to the specified precision.

Parameters:

prec - requested precision

value - number to be rounded

Returns:

rounded value

  public static double max(double a,
                           double b)

Returns the maximum of two floating point values. Faster than the naive Math.max()

Parameters:

a - first floating point value

b - second floating point value

Returns:

maximum of a and b

  public static double min(double a,
                           double b)

Returns the minimum of two floating point values. Faster than the naive Math.min()

Parameters:

a - first floating point value

b - second floating point value

Returns:

minimum of a and b

  public static double abs(double a)

Returns the absolute value of a floating point number. than the naive Math.abs()

Parameters:

a - floating point value

Returns:

absolute value of a

  public static int abs(int a)

Returns the absolute value of an integer number. than the naive Math.abs()

Parameters:

a - floating point value

Returns:

absolute value of a

  public static void trace()

Debug method that displays a call stack at a particular point.

  public static Color brighter(Color color)

Calculates the color even when it is saturated, for example, when it is black or white.

  public static Color darker(Color color)

Calculates the color even when it is saturated, for example, when it is black or white.

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